Self-disengaging lock for a car lock mechanism

Abstract

A self-disengaging lock for a motor vehicle lock mechanism, including a fixed stator and a rotor which is rotatably mounted in the stator and which comprises pins which are radially mobile under the action of a key intended to be axially introduced into the rotor, where the rotor is coupled to a control device of the lock, in an angular alignment in the manner of a cardan joint, when the key is correct, and the rotor is decoupled from the control device in the disengaged position, where the rotor is coupled to the control device directly, the end of the control device having a coupling arrangement held by the stator and the end of the rotor having another complementary coupling arrangement, where the coupling of the rotor and the control device enables the angular displacement of the control device in order to ensure the angular alignment.

1 . A self-disengaging lock for a motor vehicle lock mechanism, comprising:
 a fixed stator,   a rotor which is rotatably mounted in the stator and which comprises pins which are radially mobile under the action of a key intended to be axially introduced into the rotor,   wherein the rotor is coupled to a control device of the lock, in an angular alignment in the manner of a cardan joint, when the key is correct, and decoupled therefrom in the disengaged position,   wherein said coupling of the rotor and of the control device is direct, the end of the control device consisting of a first coupling arrangement held by the stator and the end of the rotor consisting of a second complementary coupling arrangement said coupling enabling the angular displacement of said control device in order to ensure said angular alignment.   
   
   
       2 . The lock as claimed in  claim 1 , wherein the lock further comprises an indexer which is axially mobile between a resting position and a disengaged position, following the driving in rotation of the rotor by means of an incorrect key, this indexer being connected directly in rotation to said control device. 
   
   
       3 . The lock as claimed in  claim 2 , wherein the rotor and the indexer are connected in translation. 
   
   
       4 . The lock as claimed in  claim 1 , wherein said first coupling arrangement consists of a sphere with n axial faces and in that said second arrangement consists of a corresponding housing of polygonal section with n sides. 
   
   
       5 . The lock as claimed in  claim 3 , wherein said indexer is connected in rotation to said control device by means of a bore of polygonal section with n sides in engagement with said sphere. 
   
   
       6 . The lock as claimed in  claim 1 , wherein said first coupling arrangement consists of a housing provided with m inclined radial grooves and in that said second arrangement consists of m corresponding inclined radial ribs. 
   
   
       7 . The lock as claimed in  claim 6 , wherein said housing forming said first coupling arrangement is arranged in a sphere with n axial faces arranged at the end of said control device and held by the stator. 
   
   
       8 . The lock as claimed in  claim 3 , wherein said indexer is connected in rotation to said control device by means of a bore of polygonal section with n sides in engagement with said sphere. 
   
   
       9 . The lock as claimed in  claim 4 , wherein said number n is greater than or equal to six. 
   
   
       10 . The lock as claimed in  claim 6 , wherein said number m is greater than or equal to four. 
   
   
       11 . A self-disengaging lock part intended to be mounted on a control device in order to form a lock as claimed in  claim 1 . 
   
   
       12 . A control device intended to be mounted on a self-disengaging lock part in order to form a lock as claimed in  claim 1 .